准噶尔盆地东部吉木萨尔-吉南凹陷构造演化及原型盆地恢复  

Tectonic evolution and prototype basin reconstruction in the Jimsar and Jinan depressions,eastern Junggar Basin

作　　者：夏世威 马强 黄传炎[2] 张伟 李潇鹏 张宏 马江浩 彭亚中 聂锋 XIA Shiwei;MA Qiang;HUANG Chuanyan;ZHANG Wei;LI Xiaopeng;ZHANG Hong;MA Jianghao;PENG Yazhong;NIE Feng(School of Earth Resources,China University of Geosciences(Wuhan),Wuhan 430074,China;Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education,China University of Geosciences(Wuhan),Wuhan 430074,China;Research Institute of Exploration and Development of Xinjiang Tuha Oilfield Company,Tuha Xinjiang 839009,China;College of Earth Science and Space Information Engineering,Hunan University of Science and Technology,Xiangtan Hunan 411100,China)

机构地区：[1]中国地质大学(武汉)资源学院,武汉430074 [2]中国地质大学(武汉)构造与油气资源教育部重点实验室,武汉430074 [3]新疆维吾尔自治区吐哈油田公司勘探开发研究院,新疆吐哈839009 [4]湖南科技大学地球科学与空间信息工程学院,湖南湘潭411100

出　　处：《地质科技通报》2024年第3期170-179,共10页Bulletin of Geological Science and Technology

基　　金：中国石油吐哈油田分公司科研项目“吉木萨尔凹陷及周缘二叠系沉积相及储层特征研究”(ZDXMZC2022004)。

摘　　要：自2020年开始,随着准噶尔盆地吉木萨尔凹陷双吉构造带的研究深入、萨探1井在二叠系井井子沟组试油获得高产油流,表明了吉木萨尔凹陷、吉南凹陷具有良好的常规油气勘探潜力。为深入研究吉木萨尔凹陷和吉南凹陷的地质特征及勘探潜力,综合岩心、录井、测井和地震等资料,通过识别区域不整合面,划分出不同构造阶段,得到构造与地层演化的关系。在此基础上恢复各地层发育过程,建立构造与研究区内隆凹演化的耦合关系,对原型盆地进行恢复。研究表明,吉木萨尔及吉南凹陷发育5个区域大型不整合面,经历了4幕构造活动。研究区地层演化特征从“北高南低”(早二叠世)发展为“南高北低”(古近纪、新近纪)。原型盆地也由早二叠世的“多凸多凹”格局,在古近纪、新近纪时期转变为“少凸大凹”的构造格局。构造与隆凹演化耦合关系的确立及各时期原型盆地的恢复为厘清吉木萨尔凹陷、吉南凹陷不同时期的盆地特征奠定了重要基础,有助于深化吉木萨尔凹陷、吉南凹陷的油气勘探工作。Since 2020,with in-depth research on the Shuangji structural belt in the Jimsar Depression,Junggar Basin and high-yield oil flow data obtained from the Triassic Jingjingzigou Formation in the Well Satan 1,it has been demonstrated that the Jimsar and Jinan depressions have promising potential for conventional oil and gas exploration.[Objective]To further study the geological characteristics and exploration potential of the Jimsar and Jinan depressions,[Methods]this paper comprehensively analyses data from core samples,logging,well logging,and seismic surveys;identifies regional unconformities;categorizes different tectonic stages;and establishes the correlation between tectonic and stratigraphic evolution.Based on this,the development process of each stratum is restored,and the coupling relationship between tectonics and the evolution of uplift and depression within the research area is established,and the prototype basin is restored.[Results]This study revealed five large unconformities in the Jimsar and Jinan depressions,which have undergone four episodes of tectonic activity.The stratigraphic evolution characteristics of the study area ranged from"north high and south low"in the Early Permian to"south high and north low"in the Palaeogene and Neogene.The original basin also changed from a"multiconvex and multiconcave"pattern in the Early Permian to a"few convex and large concave"structural pattern in the Palaeogene and Neogene.[Conclusion]The establishment of the coupling relationship between tectonics and the evolution of uplift and depression at different times and the restoration of the prototype basin during each period lays an important foundation for clarifying the basin characteristics of the Jimsar and Jinan depressions during different periods and helps to enhances oil and gas exploration in these areas.

关 键 词：构造幕次 原型盆地 吉南凹陷 吉木萨尔凹陷 准噶尔盆地 

分 类 号：P618.13[天文地球—矿床学]